Scientists are eager to find out whether Mars was once capable of supporting life, and according to new Curiosity findings, ...

A photomosaic taken by the Curiosity rover on April 30, 2023, at one drill site in Gale Crater, Mars. Rock powder samples ...

Siderite is an iron carbonate mineral. Its presence in sedimentary rocks formed billions of years ago offers evidence that Mars once had a dense atmosphere rich in carbon dioxide, a gas that would ...

One standout mineral in Curiosity's new discovery is siderite, an iron-rich carbonate found in surprisingly high amounts — between five and 10% by weight — alongside salts that dissolve easily ...

That carbon dioxide and water should have reacted with Martian rocks to create carbonate minerals. Until now, though, rover missions and near infrared spectroscopy analysis from Mars-orbiting ...